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Global Change Biology
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Global Change Biology
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Global Change Biology
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Acclimation of leaf respiration consistent with optimal photosynthetic capacity

Authors: Ian J. Wright; Keith J. Bloomfield; Peter B. Reich; Peter B. Reich; Han Wang; Jens Kattge; I. Colin Prentice; +6 Authors

Acclimation of leaf respiration consistent with optimal photosynthetic capacity

Abstract

AbstractPlant respiration is an important contributor to the proposed positive global carbon‐cycle feedback to climate change. However, as a major component, leaf mitochondrial (‘dark’) respiration (Rd) differs among species adapted to contrasting environments and is known to acclimate to sustained changes in temperature. No accepted theory explains these phenomena or predicts its magnitude. Here we propose that the acclimation of Rd follows an optimal behaviour related to the need to maintain long‐term average photosynthetic capacity (Vcmax) so that available environmental resources can be most efficiently used for photosynthesis. To test this hypothesis, we extend photosynthetic co‐ordination theory to predict the acclimation of Rd to growth temperature via a link to Vcmax, and compare predictions to a global set of measurements from 112 sites spanning all terrestrial biomes. This extended co‐ordination theory predicts that field‐measured Rd and Vcmax accessed at growth temperature (Rd,tg and Vcmax,tg) should increase by 3.7% and 5.5% per degree increase in growth temperature. These acclimated responses to growth temperature are less steep than the corresponding instantaneous responses, which increase 8.1% and 9.9% per degree of measurement temperature for Rd and Vcmax respectively. Data‐fitted responses proof indistinguishable from the values predicted by our theory, and smaller than the instantaneous responses. Theory and data are also shown to agree that the basal rates of both Rd and Vcmax assessed at 25°C (Rd,25 and Vcmax,25) decline by ~4.4% per degree increase in growth temperature. These results provide a parsimonious general theory for Rd acclimation to temperature that is simpler—and potentially more reliable—than the plant functional type‐based leaf respiration schemes currently employed in most ecosystem and land‐surface models.

Country
United Kingdom
Keywords

550, Biodiversity & Conservation, 05 Environmental Sciences, PLANT RESPIRATION, Environmental Sciences & Ecology, NITROGEN LIMITATION, leaf mass per area, acclimation, land-surface model, nitrogen, carboxylation capacity (V-cmax), climatic changes, THERMAL-ACCLIMATION, XXXXXX - Unknown, carbon cycle, nitrogen cycle, co-ordination, 580, Science & Technology, photosynthesis, Ecology, leaf nitrogen, carbon, BIOCHEMICAL-MODEL, carboxylation capacity (Vcmax), 06 Biological Sciences, CLIMATE, optimality, VARIABILITY, climate change, LIGHT, ECOSYSTEM RESPONSES, Biodiversity Conservation, TEMPERATURE RESPONSES, Life Sciences & Biomedicine, Environmental Sciences, TRAITS

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    This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
    Top 1%
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citations
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
84
Top 1%
Top 10%
Top 1%
Green
hybrid